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Table 4 Multivariable regression using percentile cut-off points for association between maternal HRQoL and development of VLBW children at 2.5 years old

From: Health-related quality of life of mothers and developmental characteristics of very low birth weight children at 2.5 years of age: results from the Japan Environment and Children’s Study (JECS)

Variable

Analysis Dataset

No

Group

No. (%)

Physical QOL

Coefficient (95% CI)

Mental QOL

Coefficient (95% CI)

Communication

262

Above 16.0 percentile [Reference]

158 (60.3%)

-

-

  

Between 2.5–16.0 percentile

77 (29.4%)

-0.257 (-2.236—1.723)

0.106 (-1.360—1.572)

  

Below 2.5 percentile

27 (10.3%)

-0.186 (-3.189—2.817)

-0.335 (-2.559—1.888)

Gross motor

262

Above 16.0 percentile [Reference]

140 (53.4%)

-

-

  

Between 2.5–16.0 percentile

83 (31.7%)

-0.951 (-2.876—0.974)

-0.161 (-1.598—1.277)

  

Below 2.5 percentile

39 (14.9%)

2.047 (-0.576—4.669)

-1.513 (-3.471—0.445)

Fine motor

259

Above 16.0 percentile [Reference]

150 (57.9%)

-

-

  

Between 2.5–16.0 percentile

89 (34.4%)

0.765 (-1.162—2.693)

0.291 (-1.129—1.711)

  

Below 2.5 percentile

20 (7.7%)

0.315 (-3.262—3.891)

-2.118 (-4.752—0.517)

Problem- solving

263

Above 16.0 percentile [Reference]

159 (60.5%)

-

-

  

Between 2.5–16.0 percentile

67 (25.5%)

0.370 (-1.694—2.433)

-0.463 (-1.990—1.064)

  

Below 2.5 percentile

37 (14.1%)

0.754 (-1.903—3.412)

-1.078 (-3.044—0.888)

Personal- social

263

Above 16.0 percentile [Reference]

167 (63.5%)

-

-

  

Between 2.5–16.0 percentile

62 (23.6%)

1.542 (-0.566—3.651)

-0.517 (-2.085—1.051)

  

Below 2.5 percentile

34 (12.9%)

0.930 (-1.741—3.601)

-0.077 (-2.064—1.909)

Overall

258

No domain below 2.5 percentile [Reference]

191 (74.0%)

-

-

  

Any domain below 2.5 percentile

67 (26.0%)

0.759 (-1.296—2.814)

-0.345 (-1.872—1.182)

Overall (2 domains)

257

One or no domain below 2.5 percentile [Reference]

221 (86.0%)

-

-

  

At least 2 domains below 2.5 percentile

36 (14.0%)

0.546 (-2.066—3.158)

-0.959 (-2.894—0.975)